RyanL - I just started following your project, very impressive. I am slowly accumulating parts to do a similar type of project with a Case DO.
Do you expect any trouble with your steering cylinder? Most steering cylinders are designed to use the same fluid volume in both directions. You mentioned that it was just a cylinder that you had laying around, so it probably takes more fluid to extend than to retract.
I ask because my project is still on the drawing board and I've been wondering if I will need to find a specialized cylinder or not.